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NEET • BIOLOGY • ANATOMY OF FLOWERING PLANTS
Anatomy of flowering plants practice · Medium
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121
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Understanding
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Which of the following statement is correct?
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because all the statements regarding the organization of biological systems are accurate.
122
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122 of 199
Remembering
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The ring arrangement of vascular bundle is the characteristic feature of
View answer and explanation
Correct option: D
Dicot stem
Option D is correct because the ring arrangement of vascular bundles is a characteristic feature of dicot stems.
123
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Remembering
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Mature sieve tube cells has how many nucleus?
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Correct option: D
None of these
Option D is correct because mature sieve tube cells lack a nucleus.
124
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Remembering
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Vascular bundles, in which xylem and phloem occur as separate bundles are known as
View answer and explanation
Correct option: C
Radial
Option C (Radial) is correct because radial vascular bundles have xylem and phloem arranged in alternating radii.
125
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125 of 199
Remembering
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Motor cells are found in
View answer and explanation
Correct option: B
Upper epidermis of monocot leaf
Option B (Upper epidermis of monocot leaf) is correct because motor cells (bulliform cells) are found in the upper epidermis of monocot leaves and help in leaf rolling.
126
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Analyzing
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Assertion (A): Number of sap wood cells remain constant, while of heart wood gradually increases.
Reason (R): Heart wood arises earlier than sap wood.
Reason (R): Heart wood arises earlier than sap wood.
View answer and explanation
Correct option: C
(A) is true but (R) is false
Option C ((A) is true but (R) is false) is correct because the number of sapwood cells remains relatively constant, while heartwood increases, but heartwood arises later than sapwood.
127
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Remembering
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The secondary meristem initiates
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Correct option: C
Radial growth
Option C (Radial growth) is correct because secondary meristems, like the vascular cambium and cork cambium, are responsible for increasing the girth or diameter of the plant, which is radial growth.
128
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Analyzing
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Assertion : Annual rings do not occur in dicot
trees growing on sea shore.
Reason : There is little climate variation.
trees growing on sea shore.
Reason : There is little climate variation.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A is correct because both the assertion and the reason are true, and the reason correctly explains why annual rings may not be distinct in trees growing on the seashore.
129
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Understanding
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Complex tissue includes
View answer and explanation
Correct option: C
Conducting tissue
Option C is correct because complex tissues, like xylem and phloem (conducting tissues), are composed of multiple cell types working together.
130
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Remembering
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In flowering plants, the main water transporting elements are
View answer and explanation
Correct option: D
Both (a) and (b)
Option D (Both (a) and (b)) is correct because both tracheids and vessels are the main water-transporting elements in flowering plants (angiosperms).
131
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Remembering
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Medullary or pith ray is the
View answer and explanation
Correct option: A
Radial strip of parenchyma which is present between vascular bundles
Option A is correct because medullary rays are radial strips of parenchyma cells located between vascular bundles.
132
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Analyzing
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Select the incorrect statements related to anatomical characters from the following
(I) Endodermis is a part of the stele
(II) Endodermis with casparian strips are found in the dicot stem
(III) Bulliform cells are found in the upper epidermis of the isobilateral leaf.
(IV) Vascular bundles are open in monocot stems.
(I) Endodermis is a part of the stele
(II) Endodermis with casparian strips are found in the dicot stem
(III) Bulliform cells are found in the upper epidermis of the isobilateral leaf.
(IV) Vascular bundles are open in monocot stems.
View answer and explanation
Correct option: A
I, II, IV
Option A (I, II, IV) is correct because endodermis is part of the cortex, not the stele; Casparian strips are found in root endodermis, not dicot stem; and vascular bundles are closed in monocot stems.
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Understanding
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Parenchymatous cells are usually present in the
I. pericycle
II. pith
III. medullary rays
IV. primary root
V. secondary root
VI. primary stem
VII. secondary stem
Select the correct combinations from the given options
I. pericycle
II. pith
III. medullary rays
IV. primary root
V. secondary root
VI. primary stem
VII. secondary stem
Select the correct combinations from the given options
View answer and explanation
Correct option: B
All except V and VII
Option B is correct because parenchymatous cells are found in pericycle, pith, medullary rays, primary root, and primary stem, but not typically in secondary root and secondary stem.
134
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Remembering
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Quiescent centre is present in
View answer and explanation
Correct option: B
Root apex
Option B (Root apex) is correct because the quiescent center is a region of inactive cells found in the root apical meristem.
135
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Analyzing
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I. Usually cortex of stem is formed the during secondary growth of the stem II. It is a couple of layer thick III. It is made up of thin walled rectangular cells Select the incorrect statements
View answer and explanation
Correct option: D
None of these
Option D is correct because all three statements are incorrect. Cortex is formed during primary growth, is many layers thick, and is made of thin-walled cells.
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136
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Remembering
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Vascular bundle with cambium is called
View answer and explanation
Correct option: B
Open
Option B is correct. A vascular bundle with cambium is called open because the cambium allows for secondary growth.
137
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Understanding
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When strong wind blows, the plants bend down and then again become erect. This flexibility in plants is due to
View answer and explanation
Correct option: C
Collenchyma
Option C (Collenchyma) is correct because collenchyma tissue provides flexibility to plants, allowing them to bend without breaking.
138
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Understanding
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Which of the following statements is not related to parenchyma?
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Correct option: C
They are present in all parts of higher plant except root
Option C (They are present in all parts of higher plant except root) is correct because parenchyma is present in roots as well.
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Remembering
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Storage of food is the main function of:-
View answer and explanation
Correct option: D
Parenchyma
Option D is correct because parenchyma cells are primarily involved in storage of food and other substances.
140
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Understanding
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Vascular cambium of stem is
View answer and explanation
Correct option: A
Partly primary and partly secondary meristem
Option A (Partly primary and partly secondary meristem) is correct because the vascular cambium in stems originates partly from procambium (primary) and partly from interfascicular cambium (secondary).
141
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Remembering
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In dicotyledonous root
View answer and explanation
Correct option: C
2 to 4 xylem and phloem patches are found
Option C (2 to 4 xylem and phloem patches are found) is correct because dicotyledonous roots typically have 2 to 4 xylem and phloem strands.
142
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Understanding
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Which is not correct about Sclereids?
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Correct option: A
These are parenchyma cells with thickened lignified walls
Option A is correct because sclereids are not parenchyma cells but are a type of sclerenchyma cell with thickened, lignified walls.
143
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Understanding
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Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by
View answer and explanation
Correct option: D
Endarch condition of stem and exarch condition of root
Option D is correct because the arrangement of protoxylem differs in roots and stems; roots have exarch protoxylem while stems have endarch protoxylem.
144
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Largest number of chloroplast is found in
View answer and explanation
Correct option: A
Palisade tissue
Option A is correct because palisade tissue, being the primary photosynthetic tissue in leaves, contains the largest number of chloroplasts.
145
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Remembering
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Which of the following characters belong to sclerenchyma?
I. Consists of long narrow cells with thick lignified cell walls
II. Having few or numerous pits
III. They are usually dead and without protoplasms
I. Consists of long narrow cells with thick lignified cell walls
II. Having few or numerous pits
III. They are usually dead and without protoplasms
View answer and explanation
Correct option: D
I, II and III
Option D (I, II and III) is correct because all three statements accurately describe the characteristics of sclerenchyma cells.
146
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Understanding
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The protoxylem and metaxylem in the stem lies towards
View answer and explanation
Correct option: D
The pith and periphery of organ, respectively
Option D (The pith and periphery of organ, respectively) is correct because in stems, protoxylem lies towards the pith (center) and metaxylem lies towards the periphery.
147
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Remembering
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Epidermis is derived from
View answer and explanation
Correct option: D
Protoderm
Option D (Protoderm) is correct because the epidermis, the outermost layer of plant cells, is derived from the protoderm, which is a primary meristem.
148
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Understanding
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I. Elongated or tube like cell with thick and lignified walls and tapering ends
II. These are dead and without the protoplasm
III. The inner layers of cell walls have thickening which vary in form
The above mentioned characters belong to which of the following plant structure?
II. These are dead and without the protoplasm
III. The inner layers of cell walls have thickening which vary in form
The above mentioned characters belong to which of the following plant structure?
View answer and explanation
Correct option: A
Tracheids
Option A (Tracheids) is correct because the description matches the characteristics of tracheids: elongated cells with thick, lignified walls and tapering ends, being dead without protoplasm.
149
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Remembering
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In stem, the xylem is
View answer and explanation
Correct option: C
Endarch
Option C (Endarch) is correct because in stems, the protoxylem is located towards the center (pith) and metaxylem towards the periphery, which defines the endarch condition.
150
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I. Made up of elongated, tapering cylindrical cells which have dense cytoplasm and nucleus
II. Cell wall composed of cellulose
III. Stores food materials
The above mentioned characters belong to which attribute of phloem?
II. Cell wall composed of cellulose
III. Stores food materials
The above mentioned characters belong to which attribute of phloem?
View answer and explanation
Correct option: C
Phloem parenchyma
Option C (Phloem parenchyma) is correct because phloem parenchyma cells are elongated, cylindrical, have dense cytoplasm and a nucleus, possess cellulose walls, and store food materials.
Revision notes and key takeaways
Review ANATOMY OF FLOWERING PLANTS in your textbook or class notes, then use this set to check your understanding.
Showing 121-150 of 199 questions